19-letter words containing l, a, h, b
- goldbach conjecture — an unproved theorem that every even integer greater than 2 can be written as the sum of two prime numbers.
- grasshopper warbler — a Eurasian warbler Locustella naevia
- hamiltonian problem — (computability) (Or "Hamilton's problem") A problem in graph theory posed by William Hamilton: given a graph, is there a path through the graph which visits each vertex precisely once (a "Hamiltonian path")? Is there a Hamiltonian path which ends up where it started (a "Hamiltonian cycle" or "Hamiltonian tour")? Hamilton's problem is NP-complete. It has numerous applications, sometimes completely unexpected, in computing.
- handlebar moustache — a man's moustache having long, curved ends that resemble the handlebars of a bicycle.
- hang in the balance — to fasten or attach (a thing) so that it is supported only from above or at a point near its own top; suspend.
- have a problem with — to be unable to understand or do
- have one's blood up — to be or cause to be angry or inflamed
- heat of sublimation — the heat absorbed by one gram or unit mass of a substance in the process of changing, at a constant temperature and pressure, from a solid to a gaseous state. Compare sublime (def 10).
- heptachlorobiphenyl — (organic compound) Either of twenty-four isomers of the polychlorinated biphenyl containing seven chlorine atoms.
- hildegard of bingen — Hildegard von (Hildegard of Bingen"Sibyl of the Rhine") 1098–1178, German nun, healer, writer, and composer.
- honorable discharge — a discharge from military service of a person who has fulfilled obligations efficiently, honorably, and faithfully.
- horizontal mobility — movement from one position to another within the same social level, as changing jobs without altering occupational status, or moving between social groups having the same social status.
- hydrostatic balance — a balance for finding the weight of an object submerged in water in order to determine the upthrust on it and thus determine its relative density
- hyperbolic cosecant — a hyperbolic function that is the reciprocal of hyperbolic sine
- interchangeableness — Quality of being interchangeable.
- isle of shoals boat — a sailing boat formerly used in Ipswich Bay, Massachusetts, rigged with two spritsails or gaff sails.
- isthmus of san blas — the narrowest part of the Isthmus of Panama. Width: about 50 km (30 miles)
- label switched path — (networking) (LSP) The specific path through a network that a datagram follows, based on its MPLS labels.
- liberation theology — a 20th-century Christian theology, emphasizing the Biblical and doctrinal theme of liberation from oppression, whether racial, sexual, economic, or political.
- line-of-battle ship — ship of the line.
- lobster-tail helmet — a burgonet fitted with a long, articulated tail of lames for protecting the nape of the neck, worn by cavalry in the 17th century.
- mary mcleod bethune — Mary McLeod [muh-kloud] /məˈklaʊd/ (Show IPA), 1875–1955, U.S. educator and civil-rights leader.
- naberezhniye chelny — city in E European Russia, on the Kama River: pop. 514,000
- neville chamberlain — (Arthur) Neville, 1869–1940, British statesman: prime minister 1937–40.
- non-distinguishable — to mark off as different (often followed by from or by): He was distinguished from the other boys by his height.
- not by a long chalk — by no means; not possibly
- not by a long sight — on no account; not at all
- olive-backed thrush — Swainson's thrush.
- on someone's behalf — in / on behalf of, as a representative of or a proxy for: On behalf of my colleagues, I address you tonight.
- on the baker's list — in good health
- out at (the) elbows — shabby; poverty-stricken
- own flesh and blood — If you say that someone is your own flesh and blood, you are emphasizing that they are a member of your family.
- palaeoethnobotanist — someone who studies fossil seeds and grains to further archaeological knowledge, esp of the domestication of cereals
- paradichlorobenzene — a white, crystalline, volatile, water-insoluble solid, C 6 H 4 Cl 2 , of the benzene series, having a penetrating odor: used chiefly as a moth repellent.
- phenylthiocarbamide — a crystalline, slightly water-soluble solid, C 6 H 5 NHCSNH 2 , that is either tasteless or bitter, depending upon the heredity of the taster, and is used in medical genetics and as a diagnostic.
- phthalocyanine blue — a pigment used in painting, derived from copper phthalocyanine and characterized chiefly by its brilliant, dark-blue color and by permanence.
- pseudo-biographical — of or relating to a person's life: He's gathering biographical data for his book on Milton.
- redress the balance — to make a fair adjustment; see that justice is done
- refreshable display — braille display
- removable hard disk — (storage) A type of magnetic disk, or possibly magneto-optical disk which is not permanently attached to the disk drive (not a fixed disk) but which can be taken out and replaced, allowing many disks to be used in the same drive. The term "removable disk" would seem to be applicable to floppy disks but is generally reserved for hard disks in suitable cartridges such as those made by Syquest, Iomega and others. Removable disk packs were common on minicomputers such as the PDP-11 in use in the 1970s except that the drives were the size of washing machines and the disk packs as big as car wheels. Removable disks became popular on microcomputers in the 1990s as a cheap way of expanding disk space, transporting large amounts of data between computers and storing backups. Large, cheap fixed hard disks and USB memory sticks have made removable disks less attractive.
- republique malgache — French name of Malagasy Republic.
- research laboratory — place for scientific experimentation
- sb's spiritual home — your spiritual home is the place where you feel that you belong, usually because your ideas or attitudes are the same as those of the people who live there
- short-tail business — Short-tail business is insurance business where it is known that claims will be made and settled quickly.
- simple carbohydrate — a carbohydrate, as glucose, that consists of a single monosaccharide unit.
- southern crab apple — a tree, Malus angustifolia, of the eastern U.S., having oblong leaves, fragrant, pink or rose-colored flowers, and small, round, yellow-green fruit.
- spaghetti bolognese — Italian dish of pasta and tomato sauce
- stochastic variable — a random variable.
- switchblade (knife) — a large jackknife that snaps open when a release button on the handle is pressed
- tarnished plant bug — a bug, Lygus lineolaris, of the family Miridae, that is a common and widely distributed pest of alfalfa and other legumes and of peach and other fruit trees.